CN103250076A - Optical member, method for manufacturing same, backlight unit using the optical member, and method for manufacturing the backlight unit - Google Patents
Optical member, method for manufacturing same, backlight unit using the optical member, and method for manufacturing the backlight unit Download PDFInfo
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- CN103250076A CN103250076A CN2011800543924A CN201180054392A CN103250076A CN 103250076 A CN103250076 A CN 103250076A CN 2011800543924 A CN2011800543924 A CN 2011800543924A CN 201180054392 A CN201180054392 A CN 201180054392A CN 103250076 A CN103250076 A CN 103250076A
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- light source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The present invention relates to an optical member, comprising: a light incidence surface; and a light-emitting surface which comprises a patterned portion intended for adjusting the intensity of light and formed at an area corresponding to a light source, and an adhesive portion disposed in an area other than the patterned portion. When the optical member of the present invention is applied to a backlight unit, the patterned portion, which diffuses the light from the light source, is formed in the area corresponding to the light source so as to effectively diffuse the light from the light source into the peripheral area.; Also, the optical member and a diffusion plate are stacked via an air layer in the area corresponding to the light source (the area in which the patterned portion is disposed), and the optical member and the diffusion plate closely contact each other without an air layer in the remaining area, such that the intensity of the light transmitted between a light source portion and the peripheral portion may be adjusted with an improvement in the balance of brightness and uniformity.
Description
Technical field
The present invention relates to a kind of optical element, more particularly, relate to a kind of optical element for back light unit.
Background technology
In general, the back light unit for display device (such as LCD (LCD)) is arranged on the back side of the display panel that self does not have lighting function so that the parts of even projection plane light.According to the position of the light source of launching actual light, back light unit can be divided into direct-type backlight unit and side type back light unit.In direct-type backlight unit, light source is arranged on the below of display panel and the light of emission passes display panel, thereby favourable to large-sized monitor.In the side type back light unit, light source is arranged on the edge of display panel, thereby favourable to thin and compact display.
Fig. 1 is cut-open view, shows the configuration of existing direct-type backlight unit.
As shown in Figure 1, existing direct-type backlight unit comprises a plurality of light sources 120, reflecting plate 110, light guide plate 130, multilayer diffuser 140 and 150, light harvesting film 160 and diaphragm 170.
In addition, in the situation of existing direct-type backlight unit, because therefore the brightness on the positive top of light source and the brightness difference between the light source Mura defective can take place.As shown in Figure 1, multilayer diffuser 140 and 150 is used for making light diffusion on whole plane of light source emission, to prevent the Mura defective.Yet because described multilayer diffuser is, the manufacturing cost of existing direct-type backlight unit is higher, and its thickness is bigger.
In addition, for existing direct-type backlight unit, because the multilayer optical film-stack is got up, air layer is arranged between it, therefore, at the interface, light can reflect between described blooming and air layer.So, can make the transmittance deterioration.
Summary of the invention
Technical matters
One aspect of the present invention provides the manufacture method of a kind of optical element and this optical element, wherein, described optical element is used for improving the light diffusion of source region, and prevents light source or do not have the brightness variation that the light reflection at the interface between the source region causes.
Another aspect of the present invention provides the manufacture method of a kind of back light unit and this back light unit, and wherein, this back light unit is used for improving the light diffusion of source region, and prevents light source or do not have the brightness variation that the light reflection at the interface between the source region causes.
One side more of the present invention provides a kind of display device that comprises back light unit.
Technical scheme
According to an aspect of the present invention, provide a kind of optical element, it comprises: light incident side; And light exit side, this light exit side comprises figure portion in the zone corresponding with light source and the viscosity portion in the zone outside the described figure portion zone, described figure portion regulates light intensity.
According to a further aspect in the invention, provide a kind of back light unit, it comprises: light source; Described optical element; And the blooming that is layered in the light exit side of described optical element.
In accordance with a further aspect of the present invention, provide a kind of manufacture method of optical element, this method comprises following operation: (a) light exit side at optical element forms viscosity portion; And (b) in the zone corresponding with light source of the described light exit side of described optical element, form non-sticky figure portion, to regulate light intensity.
According to another aspect of the invention, provide a kind of manufacture method of back light unit, this method is included in the blooming that is used for diffusion by lamination on the optical element of said method manufacturing.
Beneficial effect
When the described optical element of embodiments of the invention applied to back light unit, the figure portion that the light that light source is sent carries out diffusion was formed in the zone corresponding with light source, thereby the light that light source sends is diffused into the peripheral region effectively.In addition, in the zone corresponding with light source (being formed with the zone of described figure portion), diffuser is layered on the described optical element and air layer is arranged betwixt, and in other zone outside described corresponding region, described optical element and described diffuser are in contact with one another and do not have air layer, make the transmitted intensity between light source and the peripheral region be able to balance, thereby improved brightness uniformity.
Description of drawings
Fig. 1 is schematic sectional view, shows the configuration of direct-type backlight unit of the prior art;
Fig. 2 is synoptic diagram, shows the configuration of the described optical element of one embodiment of the present of invention;
Fig. 3 is synoptic diagram, shows the figure in the figure portion that is formed on the described optical element of one embodiment of the present of invention;
Fig. 4 is synoptic diagram, shows the configuration of the described optical element of an alternative embodiment of the invention;
Fig. 5 is synoptic diagram, shows the described optical film of one embodiment of the present of invention and is stacked in structure on the optical element;
Fig. 6 is synoptic diagram, shows the described optical film of an alternative embodiment of the invention and is stacked in structure on the optical element;
The photo that Fig. 7 takes above the described back light unit of example of the present invention shows the brightness degree of uniformity of the described back light unit of example of the present invention;
The photo that Fig. 8 takes above reference examples 1 described back light unit of the present invention shows the brightness degree of uniformity of reference examples 1 described back light unit of the present invention; And
The photo that Fig. 9 takes above reference examples 2 described back light units of the present invention shows the brightness degree of uniformity of reference examples 2 described back light units of the present invention.
[Reference numeral]
110 reflecting plates
120 light sources
130 light guide plate
140 diffusers
150 lenticule diffusers
160 prismatic lenses
170 diaphragms
200 optical elements
212 light incident sides
214 light exit sides
220 figure portions
230 viscosity portions
240 separators
300 air layers
Blooming on 400
A has the zone of reflective graphics
Embodiment
Describe exemplary embodiment of the present invention below with reference to the accompanying drawings in detail.
Yet, because the present invention can have various modification and different embodiment, therefore, the just specific embodiment that illustrates in the accompanying drawing and will describe in detail.Yet the present invention should not be construed as limited to the specific embodiment of setting forth here, and on the contrary, the present invention is intended to contain all modification, equivalent and the replacement within concept of the present invention and the technical scope.In the accompanying drawings, identical Reference numeral is indicated components identical.
Fig. 2 is synoptic diagram, shows the configuration of the described optical element of one embodiment of the present of invention.Optical element 200 shown in Figure 2 comprises light incident side 212, light exit side 214, figure portion 220 and viscosity portion 230.
Because optical element 200 is as light guide plate, the light that conduction light source 120 sends to be to be diffused into the front side, and therefore, it is formed by film or thin slice that can transmitted light.For example, described optical element can be formed by acryl resin (for example, polymethylmethacrylate (PMMA)), celluosic resin (for example, triacetyl cellulose) and vibrin (for example, polyethylene terephthalate), but is not limited thereto.In addition, optical element 200 can use binder resin to form viscosity portion 230 effectively.For example, optical element 200 can be formed by acryl resin, urethane resin, vinyl or silicones, but is not limited thereto.
More particularly, figure portion 220 is formed on presumptive area, and this presumptive area is based on the zone corresponding with the light source 120 of the light incident side 214 of described optical element.The size of described figure portion can be determined according to described configured light sources or size.Specifically, figure portion 220 can form based on light source 120 has cartouche (namely, its major axis can arrive about 60mm for about 6mm, and its minor axis can arrive about 45mm for about 5mm), more preferably, can form a kind of cartouche (that is, its major axis can arrive about 30mm for about 10mm, and its minor axis can arrive about 20mm for about 7mm).Yet if use distance between a plurality of light emitting diodes (LED) and these LED less than above-mentioned size, the diffusion figure portion corresponding with each LED can be overlapping, and describedly form greatlyyer than top.
In addition, figure portion 220 can form by ink jet printing method.Because ink ejecting method can be used for forming figure in the noncontact mode, therefore, be conducive to form figure at the viscosity light exit side of described optical element.
In addition, the printing ink that is used to form figure portion 220 can be non-sticky printing ink.This be because, figure portion 220 does not have viscosity, other zone outside the described figure portion zone then has viscosity.
In addition, the ink thickness of figure portion 220 can change according to the quantity of the pigment composition in the printing ink, when using ink-jet to print, forms about 0.2 μ m usually to the high figure of about 15 μ m.In addition, when using ink-jet to print, by the pigment content in the printing ink is adjusted within the above-mentioned scope, can control the light diffusion degree of hope.
In addition, figure portion 220 has be used to the figure that stops with diffused light, and utilizes this figure to regulate the light intensity that passes optical element 200.In detail, figure portion 220 can comprise at least one in reflective graphics and the diffusion figure, and wherein, reflective graphics is used for light that reflection source sends reducing the transit dose of light, and the light diffusion that the diffusion figure is used for light source is sent is to the peripheral region.Here, described reflective graphics can be formed by a kind of printing ink, and this printing ink comprises at least one that select from the group that Al, Cr, Ag, Hg, Pt and Mo constitute.Here, Al, Cr, Ag, Hg, Pt and Mo can be used for reflected light.In addition, described diffusion figure can be formed by a kind of printing ink, and this printing ink comprises at least one that select from the group that titania, teflon, polystyrene and silica constitute.Here, titania, teflon, polystyrene and silica can be used for diffused light.
Fig. 3 is synoptic diagram, shows the figure in the described figure portion 220 that is formed on optical element 200 of one embodiment of the present of invention.In more detail, Fig. 3 shows a kind of figure that had not only comprised reflective graphics but also comprised the diffusion figure.
Referring to Fig. 3, when in figure portion 220, not only having formed reflective graphics but also having formed the diffusion figure, form the diffusion figure in the whole zone of figure portion 220, and middle part A forms reflective graphics on the described diffusion figure, thereby form described figure portion.
In other words, between optical element 200 and the blooming on it 400 below have the zone of light to form air layer with diffused light, thereby reduce light intensity.In addition, optical element 200 and the blooming 400 on it below unglazed zone be in contact with one another and do not have air layer therebetween so that Zhe She light reduces to minimum at the interface, thereby make minimum optical losses.So brightness uniformity just can be improved.
In addition, graphical to presumptive area by the viscosity light exit side 214 usefulness non-sticky printing ink at described optical element, perhaps graphical to presumptive area with non-sticky printing ink after the coating adhesive on the non-sticky light exit side 214 of described optical element, can form viscosity portion 230.
Fig. 4 is synoptic diagram, shows the configuration of the described optical element of an alternative embodiment of the invention.
As shown in Figure 4, optical element 200 may further include the separator 240 in figure portion 220.Separator 240 is used for keeping the predetermined space between figure portion 220 and the stacked blooming 400 on it.Can form separator 240 by the method for using printing ink to form overlapping figure.This separator that forms can have column structure.In addition, the printing ink that is used to form separator 240 can be uv curing ink or phase change ink.Reason is that uv curing ink or phase change ink can make the diffusion phenomena on the substrate surface minimize.When using uv curing ink or phase change ink to form overlapping figure (that is, separator 240), the height of this overlapping figure (that is the height of separator 240) can be tens microns.
Fig. 5 is synoptic diagram, shows the described optical film of one embodiment of the present of invention and is stacked in structure on the optical element.
When blooming 400 is layered on the optical element 200, as shown in Figure 5, between figure 220 and stacked blooming 400 on it, form air layer 300, and between viscosity portion 230 and stacked blooming 400 on it, do not form air layer, thereby viscosity portion 230 is adhered on the blooming 400, does not have air layer.Because figure portion 220 is non-stickies, therefore, figure portion 220 and stacked blooming 400 on it are not bonded to each other, and for this cause, form air layer 300 between it.In addition, because viscosity portion 230 is viscosity, therefore, viscosity portion 230 and stacked blooming 400 on it contact and do not have air layer 300.
In addition, as shown in Figure 5,300 of air layers are formed in the zone corresponding with light source 130.This is because the 220(of figure portion namely has the zone of air layer 300) be formed in the zone corresponding with light source 130.
In other words, when blooming 400 is layered on the optical element 200, in the optical element 200 below have in the zone of light source 120, between blooming 400 and optical element 200, be formed with air layer, and below do not have in the zone of light source 120, blooming 400 contacts with optical element 200, does not have air layer.Here, blooming 400 can be light-diffusing film.
According to said structure, light reflecting at the interface between air layer and blooming 400, thus reduce light quantity from 220 transmissions of figure portion, and in figure portion 220, because below light source 120 is, a large amount of light is arranged in transmission.Since below do not have do not have air layer in the zone 230 of light source 120, therefore, light is not reflecting at the interface, thereby makes the loss minimum of transmitted light, so transmitted light is evenly distributed on the whole plane.
Fig. 6 is synoptic diagram, shows the described optical film of an alternative embodiment of the invention and is stacked in structure on the optical element.
Referring to Fig. 6, because the figure portion 220 of optical element 200 comprises separator 240, therefore, because of separator 240 events, last blooming 400 can be layered in the figure portion 220 and the air layer 300 of predetermined area is arranged.In addition, by the Height Adjustable optical element 200 of control separator 240 and the interval between the last blooming 400, therefore, can select only structure, so that the light that sends of diffused light source 120 effectively in the zone corresponding with light source 120, and on whole plane, provide brightness equably.
The described optical element of embodiments of the invention can apply to direct-type backlight unit, but also can apply to the side type back light unit.In the side type back light unit, described optical element applies to the interface between light source and the optical element, to increase brightness uniformity.
The manufacture method of the described optical element of one embodiment of the present of invention comprises following operation: (a) light exit side at optical element forms viscosity portion; And (b) in the presumptive area of the described light exit side of described optical element, form figure portion.
Here, the figure portion in (b) is the zone corresponding with light source.This be for utilize optical figuring in the presumptive area corresponding with light source to stop effectively and light that diffused light source sends to the peripheral region.
In addition, the figure portion in (b) can be non-sticky.This is for by stacked upper membrane in described non-sticky figure portion and only form air layer in the zone corresponding with light source between it, and the light that sends of diffused light source is to the peripheral region effectively.
In other words, light exit side at described optical element forms bonding part, further form non-sticky figure portion in the zone corresponding with light source of described light exit side then, make described viscosity portion contact with stacked film on it and between it, do not have air layer, and in described figure portion stacked described film and between it, form air layer.
In addition, can carry out (b) by ink jet printing method.Owing to use ink ejecting method to form figure in the noncontact mode, therefore, be conducive to form figure at the viscosity light exit side of described optical element.
In addition, can use non-sticky printing ink to carry out (b).
In addition, (b) the figure portion in can comprise at least one in reflective graphics and the diffusion figure, and wherein, reflective graphics is used for the light that reflection source sends, and the light diffusion that the diffusion figure is used for light source is sent is to the peripheral region.The light that described reflective graphics reflection source sends, reducing the light transmission capacity on the positive top of light source, and the light diffusion that described diffusion figure sends light source is to the peripheral region, to produce uniform light distribution on whole plane.Here, described reflective graphics can be formed by a kind of printing ink, and this printing ink comprises at least one that select from the group that Al, Cr, Ag, Hg, Pt and Mo constitute.Here, Al, Cr, Ag, Hg, Pt and Mo are used for reflected light.In addition, described diffusion figure can be formed by a kind of printing ink, and this printing ink comprises at least one that select from the group that titania, teflon, polystyrene and silica constitute.Here, titania, teflon, polystyrene and silica are used for diffused light.
In addition, described optical element manufacture method can also comprise following operation: (c) part of the figure portion in (b) forms separator, to keep the predetermined space between this part and the stacked film on it.Here, described separator can form for patterned printing ink by overlapping, and can form column structure by overlapping printing ink.In order to form described separator, being used for patterned printing ink can be uv curing ink or phase change ink, and this printing ink minimizes the diffusion phenomena on the substrate surface.
The method that the optical element that use forms by said method is made back light unit comprises: lamination diffuser on described optical element.In other words, by roll-in method described diffuser of lamination on described optical element.So the zone that has viscosity outside the figure portion contacts with diffuser and does not have air layer, and in the structure of figure portion, diffuser with figure portion since the event of separator do not contact.In other words, diffuser is layered in the figure portion, and air layer is arranged between it.Because figure portion only is formed in the presumptive area corresponding with light source, therefore, diffuser is layered on the zone corresponding with light source of described optical element, and has air layer, remaining zone then to contact between it and do not have air layer.Because this structure is, below have in the zone of light source, light reflecting at the interface between air layer and diffuser, thus reduce light transmission capacity, and in not having the zone of light source, light is not reflecting at the interface, thereby makes the loss minimum of transmitted light.So brightness uniformity can be improved.
Hereinafter will the present invention be described in more detail by example.
[example]
1. manufacturing optical element
The thin slice that use is formed by polymethylmethacrylate (PMMA) acryl resin is as optical element, and will be attached on the surface of described optical element by the thin slice that the acrylic acid binder resin forms.
By ink ejecting method, in the presumptive area corresponding with light source with the light exit side of the optical element of described binder resin thin slice, form figure portion.
Described figure portion has cartouche (that is, based on light source, its major axis is about 20mm, and its minor axis is about 15mm), and its inside has meticulous optical figuring, and this meticulous optical figuring obtains through regulating drop density by ink-jet.In more detail, described optical figuring comprises reflective graphics and diffusion figure, and wherein, reflective graphics uses the non-sticky printing ink that contains the Ag nano particle to form, and the diffusion figure uses the non-sticky white uv curing ink that contains titania to form.
With white uv curing ink printing and overlap on the part of described figure portion, to form separator, each separator has column structure (that is, highly about 50 μ m, the about 100 μ m of diameter).Can form hundreds of separators, its external diameter can the about 0.2mm of each interval.Then, the projection ultraviolet light solidifies figure portion.
2. manufacturing back light unit
At rolling period, diffuser is laminated on the optical element of making by said method.So the zone that has viscosity outside diffuser and the figure portion contacts, and does not have air layer, and in the structure of figure portion, because separator is, figure portion does not contact with diffuser, and diffuser is layered in the figure portion and air layer is arranged betwixt.Back light unit with said structure has reduced the zone of corresponding light source and the luminance difference between the zone outside this corresponding region, and has also blocked light source.In addition, light evenly distributes on whole zone.
[reference examples 1]
1. manufacturing optical element
The thin slice that is formed by polymethylmethacrylate (PMMA) acryl resin is used as optical element.Except binder resin is not adhered on the surface of described optical element and does not form the light diffusion figure, this optical element is identical with described embodiment of the present invention.
2. manufacturing back light unit
At rolling period, diffuser is laminated on the optical element of making by said method.So described diffuser is layered on the described optical element and air layer is arranged therebetween.
[reference examples 2]
1. manufacturing optical element
The thin slice that is formed by polymethylmethacrylate (PMMA) acryl resin is as optical element, and forms figure portion in the presumptive area corresponding with light source of the light exit side of described optical element.In other words, except binder resin was not adhered on the surface of described optical element, this optical element was identical with described embodiment.
2. manufacturing back light unit
At rolling period, diffuser is laminated on the optical element of making by said method.So described diffuser is layered on the described optical element and air layer is arranged therebetween.
The photo that Fig. 7 takes above the described back light unit of described example of the present invention.The photo that Fig. 8 takes above reference examples 1 described back light unit of the present invention.The photo that Fig. 9 takes above reference examples 2 described back light units of the present invention.Fig. 7 has illustrated the brightness uniformity of back light unit in Fig. 9.
When arriving the brightness uniformity of the more described example of Fig. 9 and the described back light unit of reference examples with reference to figure 7, the described back light unit of described embodiment is compared with reference examples 2 described back light units with reference examples 1, and having better evenly at whole area, light distributes, blocked light source better and has better brightness uniformity.
Claims (15)
1. optical element comprises:
Light incident side; And
Light exit side, this light exit side comprise figure portion in the zone corresponding with light source and the viscosity portion in the zone outside the described figure portion zone, and described figure portion regulates light intensity.
2. optical element as claimed in claim 1, wherein, described figure portion is formed by non-sticky printing ink.
3. optical element as claimed in claim 1, wherein, described figure portion forms by ink-jet method.
4. optical element as claimed in claim 1, wherein, described figure portion comprises at least one in reflective graphics and the diffusion figure, wherein, described reflective graphics reflects the light that described light source sends, and the light diffusion that described diffusion figure sends described light source is to the peripheral region.
5. optical element as claimed in claim 4, wherein, described reflective graphics is formed by printing ink, and this printing ink comprises at least one that select from the group that Al, Cr, Ag, Hg, Pt and Mo constitute.
6. optical element as claimed in claim 4, wherein, described diffusion figure is formed by printing ink, and this printing ink comprises at least one that select from the group that titania, teflon, polystyrene and silica constitute.
7. optical element as claimed in claim 1, wherein, described figure portion also comprises separator, this separator is kept the preset distance between described figure portion and the stacked film on it.
8. optical element as claimed in claim 7, wherein, described separator forms by overlapping and graphical printing ink.
9. optical element as claimed in claim 8, wherein, described separator is formed by uv curing ink or phase change ink.
10. back light unit comprises:
Light source;
As the described optical element of arbitrary claim in the claim 1 to 9; And
Be layered in the blooming of the light exit side of described optical element.
11. back light unit as claimed in claim 10 wherein, forms air layer between the figure portion of described optical element and described blooming; And
The viscosity portion of described optical element and described blooming are in contact with one another and do not have an air layer.
12. a display device comprises the described back light unit of claim 11.
13. the manufacture method of an optical element comprises following operation:
(a) light exit side at optical element forms viscosity portion; And
(b) in the zone corresponding with light source of the described light exit side of described optical element, form non-sticky figure portion, to regulate light intensity.
14. method as claimed in claim 13 also comprises following operation:
(c) form separator, with the predetermined space between a part of keeping the described figure portion in (b) and the stacked film on it.
15. the manufacture method of a back light unit is included in the blooming that is used for diffusion by lamination on the optical element of claim 13 or 14 described methods manufacturings.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20100111487 | 2010-11-10 | ||
| KR10-2010-0111487 | 2010-11-10 | ||
| KR10-2011-0085941 | 2011-08-26 | ||
| KR1020110085941A KR101226936B1 (en) | 2010-11-10 | 2011-08-26 | Optical member and method for manufacturing the same and backlight using the optical member, and method for manufacturing the same |
| PCT/KR2011/006404 WO2012064013A2 (en) | 2010-11-10 | 2011-08-30 | Optical member, method for manufacturing same, backlight unit using the optical member, and method for manufacturing the backlight unit |
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| CN103250076A true CN103250076A (en) | 2013-08-14 |
| CN103250076B CN103250076B (en) | 2015-12-16 |
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| CN201180054392.4A Active CN103250076B (en) | 2010-11-10 | 2011-08-30 | Optical element and manufacture method, the back light unit using this optical element and manufacture method thereof |
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| Country | Link |
|---|---|
| US (1) | US9447946B2 (en) |
| JP (1) | JP5598885B2 (en) |
| KR (1) | KR101226936B1 (en) |
| CN (1) | CN103250076B (en) |
| TW (1) | TWI468792B (en) |
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| CN107850700A (en) * | 2015-08-05 | 2018-03-27 | 3M创新有限公司 | Optical diffuser film laminates and its manufacture method |
| CN113022186A (en) * | 2021-02-24 | 2021-06-25 | 赵正允 | Process for UV printing of golden or silver patterns and application thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101446398B1 (en) * | 2012-12-14 | 2014-10-02 | 엘지디스플레이 주식회사 | Optical film and back light unit thereof |
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Also Published As
| Publication number | Publication date |
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| KR20120050375A (en) | 2012-05-18 |
| US9447946B2 (en) | 2016-09-20 |
| TWI468792B (en) | 2015-01-11 |
| US20130208451A1 (en) | 2013-08-15 |
| JP2013546134A (en) | 2013-12-26 |
| TW201235743A (en) | 2012-09-01 |
| CN103250076B (en) | 2015-12-16 |
| JP5598885B2 (en) | 2014-10-01 |
| KR101226936B1 (en) | 2013-01-30 |
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